Backpacks (aka shields): All GPIOs you have on an Arduino Zero are free to use on the back of the console. The developer backpack is compatible with Arduino Shields. Warning: Gamebuino runs at 3.3V, it's not 5V compatible. The DAC output is used for sound. SPI slaves are present on the bus, but won't prevent you from using it.

Micro SD card socket: FAT and FAT32 compatible. Optionnal micro SD card with plenty of games provided with the deluxe early bird and deluxe perks. Change between games on the go, not computer required!

Ouch burrrrn, well done assuming people are lazy. I was looking at the ST7735 data sheet earlier today because well it seemed the most likely choice and indeed it has a VSYNC signal but that doesn't mean it is connected to the MCU on the Gamebuino META. Anyone (@sorunome ?) knows if vsync is indeed connected to a pin possibly capable of generating interrupts? Thank you.